Lock



June 15, 1937. w. R. SCHLAGE 2,083,796

LOCK I Filed May 21, 1935 2 Sheets-Sheet 1 F'il.

A TTORNEY.

June 15, 1937: w. R. SCHLAGE LOCK Filed May 21, 1935 2 Sheets-Sheet 2 6w (5. @owndmd.

ATTORNEY Patented June 15, 1937 UNETED s'rA'rss PATENT OFFIQE to Sehlage Lock Company,

San Francisco,

Calif., a corporation of California Application May 21,

Claims.

This invention relates to locks and particularly to a lock which is adapted to be applied to the surface of a door or the like.

The object of the present invention is to generally improve and simplify the construction and operation of locks of the character described; to provide a lock which is simple and compact in construction and which requires a minimum of parts; to provide a lock which is secured and supported with relation to a door or the like by means. of a mounting plate, said plate being in turn secured by screws or the like; to provide a lock of this character which covers the screws securing the mounting plate; to provide a lock in which an interlock is formed between the bolt of the lock and the mounting plate and in which the bolt can not be released from the interlock except by key action; and, further, to provide a lock having a bolt with a normal movement and an additional movement for releasing purposes which is key actuated.

The lock is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a plan view of the lock showing it applied to the door;

Fig. 2 is a side elevation of the same;

Fig. 3 is a cross section on line IIIIII of Fig. 2;

Fig. 4 is a view of the inner face of the lock housing and the mechanism contained therein;

Fig. 5 is a perspective view of the bolt;

Fig. 6 is a side elevation of a modified form of the lock;

Fig. 7 is a section on line VIIVII of Fig. 6

showing the manner in which the lock is released with relation to the mounting plate;

Fig. 8 is a perspective View of one form of mounting plate;

Fig. 9 is a side elevation showing the lock housing attached to the mounting plate as shown in Fig. 8;

Fig. 10 is a plan view partly in section showing another modified form of the lock and mounting plate;

Fig. 11 is a side elevation thereof;

Fig. 12 is a cross section taken on line XII- XII of Fig. 10;

Fig. 13 is a plan view partly in section showing another modified form of the lock and the mounting plate;

Fig. 14 is a side elevation of the same;

Fig. 15 is a cross section on line XV-XV of Fig. 13.

5 Fig. 16 is'a view similar to Fig. 4, but showing 1935, Serial No. 22,519

the plate 5 in the opposite position, said View being partly broken away;

Fig. 17 is a cross section of the key actuated pin tumbler lock.

Referring to the drawings in detail, and particularly Figs. 1 to 5, A indicates a housing which is elongated in shape and through which extends a bolt 2. Extending crosswise of the housing just below the bolt is a key actuated plug 3 which is provided with tumblers of any suitable character and is secured by a screw 4, or other suitable means, on the inner end of the plug housing disc 5 which serves two main functions, first that of securing the plug 3 against endwise removal with relation to the housing and secondly that of imparting endwise movement to the bolt. This is accomplished as follows:

Formed approximately centrally between the ends of the bolt, see Figs. 4 and 5, is a flattened portion 6 and. secured substantially centrally of said flattened portion is a pin 1 and formed on the plate 5 is a fork-shaped crank arm 5a which straddles the pin 7. This crank arm will, during rotation of plug 3 by means of a key, impart longitudinal movement to the bolt and it may thus be extended or retracted with relation to the housing as the case maybe.

In actual practice several different methods of securing the housing to the face of a door is disclosed. In Figs. 1, 2 and 3 one method is disclosed and is accomplished as follows: Referring to Fig. 4, which is a View of the inner face of the lock housing, it will be noted that three openings indicated at 8 are formed. One of these openings is also shown in Fig. 3. These openings are threaded and are adapted to receive screws or bolts '9 extending through the door and into the threadedopenings, the screws or bolts 9 being preferably passed through a plate ill on the inner face of the door so that the plate may retain the heads of the screws. By forming the threaded openings 8 in thethree positions shown, it is possible to extend them substantially completely through the housing. Long threaded passages are thus formed and doors of Varying thickness may be taken care of as it is not necessary that the screws bottom the'holes 8. With the lock secured to a door, as shown in Figs. 1 to 3, inclusive, it is only necessary to secure a strike plate II on the frame of the door. This plate is of the usual construction and has a central opening formed therein to receive the bolt when projected, hence to close the door it is only necessary to insert the key at the point indicated at l2 and to-rotate the plug so that the bolt will be projected into the strike plate when the door will become locked. Conversely, in opening the door the key is rotated in the opposite direction and the bolt is retracted permitting opening of the door.

In many instances it is not desirable to pass fastening screws through a door as it mars or disfigures the inner face of the door; neither is it desirable to place screws through the lock housing from the exterior face as the screws would be accessible and could be readily removed and the lock rendered inefiective. To overcome this fact a mounting plate has been provided as shown in Figs. 7 and 8.

It consists of a base plate l4 secured to the outer face of the door by means of screws I5, or the like. Formed at one end of the plate is a shoulder It with a central lug I1 and formed at the other end of the plate is a right angular projection 18 having a central opening l9 formed therein through which the bolt is adapted to extend. In Fig. '7 it will be noted that the lug I1 extends rearwardly, while in Fig. 8 it will be noted that the lug ll extends inwardly. The reason therefore will shortly appear. The lock housing shown in Figs. 6 and '7 is provided with a bolt 2a having a central passage 20 formed at one end in which is mounted a compression spring 2| and a pin 22. When the bolt is moved inwardly by key action it will only reach the position shown in Fig. 6, as in that position pin 22 will engage the rear end of the housing indicated at 23 and further movement by means of the key is possible but it is resisted by the tension of the spring 2|.

If a person has strong fingers it would be possible to still further turn the key and to move it to the position shown in Fig. 7, but there would be no reason for doing so. The moment a person turns the key and then finds that its further movement is suddenly resisted and that the bolt is fully retracted, there would be no occasion for turning it further. When the bolt is retracted to the position shown in Fig. 6, the plate 5 will assume the position shown in Fig. 16. If it is now desired to depress the bolt by the finger, as shown in Fig. '7, plate 5 will have clearance to permit such movement.

The key must remain within the cylinder plug if the bolt is to be depressed and moved further. The reason, therefore, is that the key actuated pin tumbler look here shown has two locking positions; one when the bolt is fully projected and the door is locked, and a second locking position when the bolt is normally retracted as shown in Fig. 6, these two positions being shown in Fig. 17. This is a common type of pin tumbler look as there are many instances in which it is desired to lock the bolt against operation, both in the projected and in the retracted position.

It is known that the cylinder plug has a keyway formed therein and that there are pin tumblers in the cylinder plug which are forced to assume diiferent positions when the key is inserted. That, of course, can only take place when the key aligns with one of the set of pin tumblers shown in Fig. 1'7. When the key slot stands vertically the pin tumblers in the cylinder plug will align with the tumblers in the housing shown at 56, see Fig. 17, and when the cylinder plug is turned to move the plate 5 to the position shown in Fig. 16 the key slot and the pin tumblers in the cylinder plug will align with the tumblers 5|. If the key is removed in this position, depression of the bolt by means of the finger, as shown in Fig. '7, will not be permitted as the cylinder plug will be locked against rotation but if the key is permitted to remain in the cylinder plug it will be possible to depress the bolt, as shown in Fig. 7.

In Figs. 6 and 7 a housing is shown which completely covers the mounting plate, the rear extension 23 covering the lugs I1 and having an opening Ila formed therein to receive said lug. A front extension 23a covers the right angular extension ill of the mounting plate and the remainder of the housing covers the base portion of the mounting plate, hence completely concealing the mounting plate and the screws l5.

When employing the mounting plate shown in Figs. 8 and 9, a rear opening l'lb' is formed in the housing to receive the lug I1 and the rear and front extensions 23 and 23a, respectively, are not employed. Hence, the bolt will extend through the opening IS in the right angular extension 18 of the mounting plate and that extension, together with the base portion of the mounting plate, will show.

In the structure shown in Fig. 9 the bolt is identical to that shown in Fig. '7. When the bolt is retracted by key action, its outer end will lie flush with the sides of the member l8 and when it is desired to break the interlock between the mounting plate and the housing, it is necessary to push the plunger inwardly until it clears the opening in the member l8, when it may be lifted as indicated by dotted lines at 25, see Fig. 9.

In the structure shown in Figs. 6 to 9, inclusive, it will be noted that the mounting plate carries 3. lug which interlocks with the lock housing and that the lock housing, in turn, carries a bolt which normally interlocks with the mounting plate. Hence, a double interlock is provided and this interlock can not be broken unless a key is inserted and the bolt is fully retracted, it being essential thereafter to further depress the bolt so as to release the interlock between it and the mounting plate before final separation of the lock housing and mounting plate may be accomplished.

In Figs. 10 to 12, inclusive, the mounting plate is shown of cylindrical form and provided with an up-turned outer annular flange. The base portion of the mounting plate is secured to the door, or other means, by screws 30 and the outer annular flange is preferably cut on a curve as shown at 3|, see Fig. 11, to permit a portion of the housing indicated at 32 to be exposed and also to permit it to be gripped for purposes of rotation. The lock housing is circular in form to fit the interior or" the annular flange 3i. mechanism and the bolt employed are identical to the structures shown in Figs. 6 to 8, inclusive, and the interlock between the bolt and the housing is the same; that is, the bolt will in the structure shown in Figs. 10 and 12 extend through the annular flange 3| and an interlock will be formed between the housing and said flange by placing a lug on the inner surface of the flange, as shown at 33, which extends into a bayonet groove 34 formed in the lock housing. After the mounting plate has been secured to the door, or whatever it may be, by means of the screws 30, the bolt is fully depressed, the housing is inserted within the annular flange 3| with the slot 34 aligning with the pin 33. A slight turning movement is then imparted to the housing permitting the pin to enter the upper end of the slot and to form an interlock. At this point the bolt will align with the opening in the flange and it may be released and will be extended by means of The key the interior spring, thereafter its function will be normal; that is, upon insertion of a key it will be fully projected or retracted. Further retraction being accomplished only by applying pressure to the outer end of the bolt to clear it with relation to the opening in the flange 3|, and this being resorted to only in case of removal, repair or otherwise.

In Figs. 13 to 15, inclusive, a further modification is shown. In this instance the mounting plate is circular and provided with an annular flange of uniform height. One side of the flange is provided with an opening to permit the end of the bolt shown at 40 to extend therethrough. The other side of the flange has a slot formed therein as indicated at 4|. The bolt employed in this instance is longer than usual and one end or the other will always project. A portion of reduced diameter is formed at the point indicated at 42. This aligns with the slot 4| when the housing is being inserted in the mounting plate. Pressure is then applied at the end indicated at 43 and the reduced portion moves out of alignment with the slot and into engagement with a spring 44. This spring permits free movement of the bolt when it is to be projected by the key actuated mechanism but it applies considerable resistance due to the steepness of the shoulder indicated at 45, when the interlock between the bolt and the mounting plate is to be broken; hence the bolt shown in the structure indicated in the Figs. 13 to 15 has a normal movement and an extended movement just as the other bolts but it differs therefrom in the type of spring employed and indicated at 44, and in the fact that the bolt interlocks with both ends of the mounting plate.

In all of the structures disclosed from Figs. 6 to 15, inclusive, a mounting plate is employed. This is secured to the face of a door, or the like, by screws and when the lock housing is applied thereto the screws become covered and become inaccessible and can not be tampered with. The only individual having access thereto is the person, or persons, in possession of the proper key as the lock housing once applied to the mounting plate can not be removed, except by insertion of the key member, retraction of the bolt thereby and the further retraction by application of pressure on the bolt to push it beyond the opening formed in the mounting plate to a point where it is released from interlocking relation so that the housing may be tilted on the mounting plate and removed.

Many forms of the mechanism could obviously be made and I similarly wish it understood that while the structure shown has been more or less specifically illustrated and described, other changes may be resorted to within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:-

l. In a lock of the character described a housing, a key actuated rotatable cylinder plug extending crosswise of the housing, a bolt extending longitudinally of the housing at right angles to the plug and directly above the same and in a position substantially central of the length of the plug, means carried by the plug for imparting movement to the bolt, said housing adapted to be secured to the face of a door, and a plurality of screw receiving passages formed in the housing to receive screws extending through the door, the longitudinal axes of the screws and the screw receiving passages being parallel to the longitudinal axis of the plug.

2. In a lock of the character described a housing, a key actuated rotatable cylinder plug extending crosswise of the housing, a bolt extending longitudinally of the housing at right angles to the plug and directly above the same and in a position substantially central of the length of the plug, means carried by the plug for imparting movement to the bolt, said housing adapted to be secured to the face of a door, and a plurality of screw receiving passages formed in the housing to receive screws extending through the door, the longitudinal axes of the screws and the screw receiving passages being parallel to the longitudinal axis of the plug and said screw receiving passages being accessible from the inner face of the housing only.

3. In a lock of the character described a housing, a bolt mounted in the housing, a mounting plate to receive and support the housing, an interlock formed between the bolt and the mounting plate to prevent removal of the housing from the mounting plate, said bolt having a normal movement when operated, and key actuated means permitting an additional movement of the bolt whereby the interlock is released.

4. In a lock of the character described the combination with a mounting plate, means for securing the plate to a support, a lock housing adapted to be received and supported by the mounting plate, said lock housing covering the means whereby the mounting plate is secured to the support, a bolt mounted in the lock housing, and an interlock formed between the bolt and the mounting plate to prevent removal of the lock housing from the mounting plate.

5. In a lock of the character described, a housing, a bolt mounted in the housing, a mounting plate to receive and support the housing, an interlock formed between the bolt and the mounting plate to prevent removal of the housing from the mounting plate, key actuated means whereby movement is imparted to the bolt, a spring member in the housing normally limiting the movement of the bolt when key actuated to prevent release of the interlock between the bolt and the mounting plate, said spring permitting additional movement of the bolt when pressure is applied to the end of the bolt, said additional movement releasing the interlock between the mounting plate and the bolt.

WALTER R. SCHLAGE. 

